22 lines
587 B
Plaintext
Executable File
22 lines
587 B
Plaintext
Executable File
// This file is part of www.nand2tetris.org
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// and the book "The Elements of Computing Systems"
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// by Nisan and Schocken, MIT Press.
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// File name: projects/2/FullAdder.hdl
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/**
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* Computes the sum of three bits.
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*/
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CHIP FullAdder {
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IN a, b, c; // 1-bit inputs
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OUT sum, // Right bit of a + b + c
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carry; // Left bit of a + b + c
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PARTS:
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// 1st half adder
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HalfAdder(a=a , b=b , sum=abSum , carry=abCarry);
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// 2nd half adder
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HalfAdder(a=abSum , b=c , sum=sum , carry=abSumCCarry);
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// Carry Or
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Or(a= abCarry, b=abSumCCarry , out=carry );
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} |